The most common and most likely answer to this crossword clue is the 6 letter word DAZZLE
I've seen this crossword clue in Financial Times
D
A
Z
Z
L
E
More clues leading to the result DAZZLE
Buddy explains!

The straight part
We know that "With cleverness, overpower" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case with cleverness, overpower = dazzle.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DAZZLE mean?
DAZZLE noun- A light of dazzling brilliancy.
- Showy brilliance that may stop a person from thinking clearly.
- A herd of zebra.
- Dazzle camouflage.
- To confuse the sight of by means of excessive brightness.
- To render incapable of thinking clearly; to overwhelm with showiness or brilliance.
- To be overpowered by light; to be confused by excess of brightness.